One of the studies already added was from Harvard: 1964 Harvard Study Indicates Boys With Blood Type A More “Tender-Minded” It isn’t surprising, that their study was added considering the source. It also isn’t surprising, that they have not continued with studies one would expect showing indications, be it to prove or dismiss. Some of the newer studies include: Psychiatric disorders and blood type AB The results of this study support the hypothesis of an association between psychiatric disorders and ABO blood groups. The probability is that psychiatric disorders will occur almost three times more frequently in carriers of AB group compared to other ABO blood groups in the Croatian population. And then there is this: Blood type A and … Continue reading Is there evidence that blood types and personality traits are connected?